Effect of Composite Disk Layering on Eddy-Current Damper Damping Behavior

In the issue of vibration suppression, the implementation of passive control systems based on eddy-current dampers and its magnetic features play the main role of lowering both the sensitivity and the power consumption. Regarding application in space systems, the eddy-current damper role is in opening of a satellite antenna. For simulation purpose of the eddy-current damper, the differential and integral forms of Maxwell equations in COMSOL software, as well as the finite element energy method in a MATLAB are used. In the electro-magnetic section by COMSOL, the simulation of electrical field and magnetic potential during the disk angle change is considered while the PDE of electro-magnetic field and energy are numerically solved through MATLAB. The application of COMSOL software based on finite-element method and Maxwell differential equations yield a discontinuity of magnetic materials effectiveness for damper. Resultant material groups were determined to be the Ferromagnetic and diamagnetic material which their pertaining substances are nickel and the copper. The results of simulation showed that applying electrical isolation leads to decrease of the damping ratio.